linux-kernel - cpufreq/ondemand: unpinning an unpinned lock.

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Date:	Wed, 15 Jul 2015 18:04:22 -0400
From:	Dave Jones <davej@...emonkey.org.uk>
To:	Linux Kernel <linux-kernel@...r.kernel.org>
Cc:	rjw@...ysocki.net, linux-pm@...r.kernel.org
Subject: cpufreq/ondemand: unpinning an unpinned lock.

WARNING: CPU: 1 PID: 29529 at kernel/locking/lockdep.c:3497 lock_unpin_lock+0x109/0x110()
unpinning an unpinned lock
CPU: 1 PID: 29529 Comm: kworker/1:1 Not tainted 4.2.0-rc2-think+ #3
Workqueue: events od_dbs_timer
 0000000000000009 ffff880094d5baa8 ffffffffae7f5e6f 0000000000000007
 ffff880094d5baf8 ffff880094d5bae8 ffffffffae07b91a 0000000000000118
 00000000000000e0 ffff880507bd5c58 0000000000000092 0000000000000004
Call Trace:
 [<ffffffffae7f5e6f>] dump_stack+0x4f/0x7b
 [<ffffffffae07b91a>] warn_slowpath_common+0x8a/0xc0
 [<ffffffffae07b996>] warn_slowpath_fmt+0x46/0x50
 [<ffffffffae0d0ec9>] lock_unpin_lock+0x109/0x110
 [<ffffffffae7f93cc>] __schedule+0x3ac/0xb60
 [<ffffffffae7f9c41>] schedule+0x41/0x90
 [<ffffffffae7f9ff8>] schedule_preempt_disabled+0x18/0x30
 [<ffffffffae7fbcef>] mutex_lock_nested+0x16f/0x3e0
 [<ffffffffae69207f>] ? gov_queue_work+0x2f/0xf0
 [<ffffffffae690ec7>] ? od_check_cpu+0x57/0xd0
 [<ffffffffae69207f>] ? gov_queue_work+0x2f/0xf0
 [<ffffffffae69207f>] gov_queue_work+0x2f/0xf0
 [<ffffffffae6918dd>] od_dbs_timer+0xbd/0x150
 [<ffffffffae099613>] process_one_work+0x1f3/0x7a0
 [<ffffffffae099582>] ? process_one_work+0x162/0x7a0
 [<ffffffffae099cb9>] ? worker_thread+0xf9/0x470
 [<ffffffffae099c29>] worker_thread+0x69/0x470
 [<ffffffffae0ad993>] ? preempt_count_sub+0xa3/0xf0
 [<ffffffffae099bc0>] ? process_one_work+0x7a0/0x7a0
 [<ffffffffae09fddf>] kthread+0x11f/0x140
 [<ffffffffae09fcc0>] ? kthread_create_on_node+0x250/0x250
 [<ffffffffae80090f>] ret_from_fork+0x3f/0x70
 [<ffffffffae09fcc0>] ? kthread_create_on_node+0x250/0x250
---[ end trace 86cca931caec9193 ]---
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